This ought to be a simple question but it doesn't seem to be. How can I find out which plugins I have installed in Firefox? The Adobe site for Flash says to go to Help -> About Plugins (in Firefox), but Firefox Help has no such option.

Type about:plugins in Firefox' address bar.

Or click here.

put this in your address bar and hit enter


about:plugins

Hi,

You can see the plugins installed under your firefox installation directory something like

example:

/firefox_installation/directory/plugins

my case: /usr/lib/firefox so ls -al will show

lrwxrwxrwx 1 root root 37 2007-11-22 20:33 flashplugin-alternative.so -> /etc/alternatives/firefox-flashplugin
lrwxrwxrwx 1 root root 39 2007-11-22 20:35 libjavaplugin.so -> /etc/alternatives/firefox-javaplugin.so
-rw-r--r-- 1 root root 9104 2007-10-22 19:42 libunixprintplugin.so
lrwxrwxrwx 1 root root 35 2007-11-22 20:32 mozplugger.so -> ../../mozilla/plugins/mozplugger.so

If you want a new plugin just give a soft link here. If dont wanna something just remove the softlink file.

You can install the aboutplug extension from here
https://addons.mozilla.org/en-US/firefox/addon/2148

Is there really any need to install an extension?

All you have to do is enter "about:plugins" into the address bar. That's hardly difficult!

Click on "Tools", "ADD-ons", there is the list of Firefox extensions.

The question was about plug-ins, not extensions.

The Add-ons manager will list plug-ins at some point in the future (it does in the current trunk nightly versions), but in the current releases it only manages extensions, themes and language packs.

Thanks for the knowledge, just trying to help.